.course-schedule {
    background-color: #2f2f2f;
    color: white;
    padding: 20px;
    border-radius: 8px;
}

input[type="datetime-local"],
select {
    padding: 12px 15px;
    margin-bottom: 20px;
    border-radius: 5px;
    border: none;
    width: 100%;
    box-sizing: border-box;
    font-size: 16px;
    color: #fff;
    background-color: #444;
    transition: all 0.3s ease;
}

input[type="datetime-local"]:focus,
select:focus {
    outline: none;
    background-color: #555;
    box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
}

input[type="datetime-local"]:hover,
select:hover {
    background-color: #f0f0f0;
    color: #333;
    /* 悬停后字体颜色变为深色 */
}

ul {
    list-style-type: none;
    padding: 0;
}

li {
    background-color: #444;
    padding: 10px;
    margin-bottom: 10px;
    border-radius: 5px;
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

li:hover {
    background-color: rgba(255, 255, 255, 0.5);
    /* 悬停后变成半透明的白色 */
    box-shadow: 0 0px 12px rgba(255, 255, 255, 0.3);
    /* 添加阴影效果 */
    cursor: pointer;
    /* 悬停时显示为可点击的手型指针 */
}